.clearfix::after{
    content: "";
    display:block;
    clear:both;
}

body{
    background: url("../images/reader_login.jpg") no-repeat ;
    background-attachment: fixed;
    min-height: 100%;
    background-size: cover;
    margin: 0;
}

.main{
    width:100%;
}

.header{
    position: fixed;
    min-width: 600px;
    width: 100%;
    left: 0;
    top: 0;
    background: #000000;
    height: 27px;
    line-height: 27px;
}

.header i{
    float: left;
    color : #fff;
    font-size:23px;
    margin-left:10px;
    line-height: 27px;
}

.content{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width:800px;
    height: 500px;
}

.content .photo{
    position: absolute;
    display: inline-block;
    width: 180px;
    height: 160px;
    overflow: hidden;
    left:292px;
    top: 180px;
}

.content .info{
    position: absolute;
    display: inline-block;
    right: 10%;
    top: 3em;
    box-sizing: border-box;
}

.content .photo img{
    font-size: 20px;
    position: absolute;
    width: 100%;
    height: 200px;
    left: 50%;
    top:50%;
    transform: translate(-50%,-50%);

}

.content .info .pho{
    margin-bottom: 2em;
    font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
    font-size: 2em;
}
.content .info .scan{
    margin-left: 13em;
}

.content .btn{
    position: absolute;
    left: 70%;
    transform: translate(-50%,-50%);
    top: 23em;
}

.content .btn button{
    margin: 0 4em;
    background: black;
    color: white;
    width: 75px;
    height:30px;
    border: none;
    cursor: pointer;
}

.content .btn button:hover{
    background: #57606f;
}

.footer{
    width: 100%;
    background-color: black;
    margin-top: 23%;
    position:fixed;
    bottom: 0;
    left:0;
    height: 100px;
}

.footer .mandarin{
    position: absolute;
    width: 250px;
    height: 90px;
    border-radius: 50%;
    overflow: hidden;
    left:50px;
    top: 5px;
}

.footer .mandarin img{
    position: absolute;
    width: 100%;
    height: 100px;
    left: 50%;
    top:50%;
    transform: translate(-50%,-50%);
}

.footer p{
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    color: #7f7f7f;
}

.tanchuceng{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100vh;
    background:rgba(0,0,0,0.5);
    z-index: 1;
    display: none;
}

.tanchuceng .msg{
    position: absolute;
    left: 50%;
    top:50%;
    transform: translate(-50%,-50%);
    width: 400px;
    height: 200px;
    background: linear-gradient(90deg,#f6e58d,#f9ca24,#ffbe76,#f0932b);
}

.tanchuceng .msg .exit{
    background: #f6e58d;
    color: black;
    position: absolute;
    right: -6px;
    top:-10px;
    border-radius: 50%;
    width: 20px;
    text-align: center;
    line-height: 20px;
    height: 20px;
    cursor: pointer;
}

.tanchuceng .msg p{
    text-align: center;
    line-height: 200px;
    margin: 0;
}